Relatedly, I'm writing whitebox jtreg tests and would like to use
VarHandles to access internal data structures.
Because I have:
* @modules java.base/java.util.concurrent:open
I can use reflection with setAccessible to obtain a usable Field, but if I
try to turn that into a VarHandle I get:
Field f = ConcurrentLinkedQueue.class.getDeclaredField("head");
f.setAccessible(true);
VarHandle v = java.lang.invoke.MethodHandles.lookup()
.unreflectVarHandle(f);
java.lang.IllegalAccessException: member is private to package:
java.util.concurrent.ConcurrentLinkedQueue.head/java.util.concurrent.ConcurrentLinkedQueue$Node/getField,
from WhiteBox (unnamed module @7a187f14)
It seems wrong to have this sort of mismatch - setAccessible works, but the
strictly more powerful VarHandles remain unobtainable.
I happen to have a workaround, but I don't see a general solution for
whitebox testing.
